Rio vs Callister

Baby Name Comparison — 2026

Rio

Boy #517 Most Popular 2 Syllables

"river"

Origin: Spanish/Portuguese

Spanish Portuguese Brazilian American

✓ All Clear

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Rio Rank #517

Callister Rank #43,579

Rio is more popular, ranked #517 vs #43579 for Callister.

Is Rio or Callister more popular?

Rio is more popular, ranked #517 compared to Callister at #43579 in the United States.

What do Rio and Callister mean?

Rio means "river" (Spanish/Portuguese origin). Callister means "defender of men" (Greek via Gaelic origin).

Are Rio and Callister boy or girl names?

Rio is primarily a boy name. Callister is primarily a boy name.